Study on WP-SVD-based Image Watermarking Algorithm Against Geometric Attack
Jinbao Wang · Information Security and Communications Privacy · 2010
Aiming at the vulnerability of digital watermarking to the geometric attack,this paper,based on analysis of WP (mavelet packet) transform,proposes a new anti-geometric attack digital watermarking algorithm based on WP-SVD.The digital image is processed in advance with discrete WP transform,then the intermediate frequency area is decomposed through SVD( singular value decomposition).After that,the watermarking image is adaptively embedded into SVD data according to the gradient method.Experimental results indicate that the proposed algorithm is of good robustness against geometric attack.